<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.father{
				width: 200px;
				height: 200px;
				background-color: red;
				position: absolute;
				left: 0;
				top: 0;
				right: 0;
				bottom: 0;
				margin: auto;
			}
		</style>
	</head>
	<body>
		<div class="father">
			
		</div>
	</body>
</html>
